In the internal linking of the sub-pages of a website should be especially sure that all the bases accessible (ie linked by at least one other point) are. Thus, the basic requirement for crawling and indexing these pages is created.

However, this alone does not guarantee that a crawler this page also visited, since Google has no unlimited resources. When a Web page is now very low in the hierarchy is settled, it can take a long time for it to indexing comes. There are also situations in which internal links is not possible, such as some dynamic technology such as Asynchronous JavaScript and XML or Flash.

For this reason, there is the opportunity to submit a sitemap. It is a file in XML format, according to the in http://www.sitemaps.org/protocol.php defined syntax must be established. In this file all pages of the domain are listed by their URL, and so have a greater chance of being crawled quickly. The number of URLs is limited to 50,000 so that any multiple Sitemaps must be created.

In order to make known the Google site map, this can be either in the file robots.txt or entered directly into the Google Webmaster Tools can be transmitted. More information about the Sitemap is also available directly from Google.